@Ignore
public class BaseTest {

    public static EntityManagerFactory emf;
    public static EntityManager em;

    @BeforeClass
    public static void runBeforeClass() throws Exception {
        emf = Persistence.createEntityManagerFactory("test-hsqldb");
        em = emf.createEntityManager();
    }

    @AfterClass
    public static void runAfterClass() throws Exception {
        emf.close();
    }

}


public class UsersTest extends BaseTest {

    private static UserServiceBean userService = new UserServiceBean();

    @Test
    public void getUsers() throws Exception {
        List<User> users = userService.getUsers();
        Assert.assertTrue(users.size() > 0);
    }

    @BeforeClass
    public static void runBeforeClass() throws Exception {
        BaseTest.runBeforeClass();
        userService.setEm(em);
    }

    @AfterClass
    public static void runAfterClass() throws Exception {
        BaseTest.runAfterClass();
    }

}



@Stateless
public class UserServiceBean implements UserService {

    private EntityManager em;

    @PersistenceContext(unitName="OurEntityManager")
    public void setEm(EntityManager em) {
        this.em = em;
    }

    public List<User> getUsers() {
        List<User> users = this.em.createQuery("select user from User user order by user.lastName").getResultList();
        return users;
    }

}